package org.spongycastle.jcajce.provider.symmetric;
import java.security.AlgorithmParameters;
import java.security.InvalidAlgorithmParameterException;
import java.security.SecureRandom;
import java.security.spec.AlgorithmParameterSpec;
import java.security.spec.InvalidKeySpecException;
import java.security.spec.KeySpec;
import javax.crypto.SecretKey;
import javax.crypto.spec.DESKeySpec;
import javax.crypto.spec.IvParameterSpec;
import javax.crypto.spec.SecretKeySpec;
import org.spongycastle.asn1.ASN1ObjectIdentifier;
import org.spongycastle.asn1.oiw.OIWObjectIdentifiers;
import org.spongycastle.crypto.KeyGenerationParameters;
import org.spongycastle.crypto.engines.DESEngine;
import org.spongycastle.crypto.engines.RFC3211WrapEngine;
import org.spongycastle.crypto.generators.DESKeyGenerator;
import org.spongycastle.crypto.macs.CBCBlockCipherMac;
import org.spongycastle.crypto.macs.CFBBlockCipherMac;
import org.spongycastle.crypto.macs.CMac;
import org.spongycastle.crypto.modes.CBCBlockCipher;
import org.spongycastle.crypto.paddings.ISO7816d4Padding;
import org.spongycastle.jcajce.provider.config.ConfigurableProvider;
import org.spongycastle.jcajce.provider.symmetric.util.BaseAlgorithmParameterGenerator;
import org.spongycastle.jcajce.provider.symmetric.util.BaseBlockCipher;
import org.spongycastle.jcajce.provider.symmetric.util.BaseKeyGenerator;
import org.spongycastle.jcajce.provider.symmetric.util.BaseMac;
import org.spongycastle.jcajce.provider.symmetric.util.BaseSecretKeyFactory;
import org.spongycastle.jcajce.provider.symmetric.util.BaseWrapCipher;
import org.spongycastle.jcajce.provider.util.AlgorithmProvider;
import org.spongycastle.jce.provider.BouncyCastleProvider;
public final class DES
{
private DES()
{
}
static public class ECB
extends BaseBlockCipher
{
public ECB()
{
super(new DESEngine());
}
}
static public class CBC
extends BaseBlockCipher
{
public CBC()
{
super(new CBCBlockCipher(new DESEngine()), 64);
}
}
/**
* DES CFB8
*/
public static class DESCFB8
extends BaseMac
{
public DESCFB8()
{
super(new CFBBlockCipherMac(new DESEngine()));
}
}
/**
* DES64
*/
public static class DES64
extends BaseMac
{
public DES64()
{
super(new CBCBlockCipherMac(new DESEngine(), 64));
}
}
/**
* DES64with7816-4Padding
*/
public static class DES64with7816d4
extends BaseMac
{
public DES64with7816d4()
{
super(new CBCBlockCipherMac(new DESEngine(), 64, new ISO7816d4Padding()));
}
}
public static class CBCMAC
extends BaseMac
{
public CBCMAC()
{
super(new CBCBlockCipherMac(new DESEngine()));
}
}
static public class CMAC
extends BaseMac
{
public CMAC()
{
super(new CMac(new DESEngine()));
}
}
public static class RFC3211
extends BaseWrapCipher
{
public RFC3211()
{
super(new RFC3211WrapEngine(new DESEngine()), 8);
}
}
public static class AlgParamGen
extends BaseAlgorithmParameterGenerator
{
protected void engineInit(
AlgorithmParameterSpec genParamSpec,
SecureRandom random)
throws InvalidAlgorithmParameterException
{
throw new InvalidAlgorithmParameterException("No supported AlgorithmParameterSpec for DES parameter generation.");
}
protected AlgorithmParameters engineGenerateParameters()
{
byte[] iv = new byte[8];
if (random == null)
{
random = new SecureRandom();
}
random.nextBytes(iv);
AlgorithmParameters params;
try
{
params = AlgorithmParameters.getInstance("DES", BouncyCastleProvider.PROVIDER_NAME);
params.init(new IvParameterSpec(iv));
}
catch (Exception e)
{
throw new RuntimeException(e.getMessage());
}
return params;
}
}
/**
* DES - the default for this is to generate a key in
* a-b-a format that's 24 bytes long but has 16 bytes of
* key material (the first 8 bytes is repeated as the last
* 8 bytes). If you give it a size, you'll get just what you
* asked for.
*/
public static class KeyGenerator
extends BaseKeyGenerator
{
public KeyGenerator()
{
super("DES", 64, new DESKeyGenerator());
}
protected void engineInit(
int keySize,
SecureRandom random)
{
super.engineInit(keySize, random);
}
protected SecretKey engineGenerateKey()
{
if (uninitialised)
{
engine.init(new KeyGenerationParameters(new SecureRandom(), defaultKeySize));
uninitialised = false;
}
return new SecretKeySpec(engine.generateKey(), algName);
}
}
static public class KeyFactory
extends BaseSecretKeyFactory
{
public KeyFactory()
{
super("DES", null);
}
protected KeySpec engineGetKeySpec(
SecretKey key,
Class keySpec)
throws InvalidKeySpecException
{
if (keySpec == null)
{
throw new InvalidKeySpecException("keySpec parameter is null");
}
if (key == null)
{
throw new InvalidKeySpecException("key parameter is null");
}
if (SecretKeySpec.class.isAssignableFrom(keySpec))
{
return new SecretKeySpec(key.getEncoded(), algName);
}
else if (DESKeySpec.class.isAssignableFrom(keySpec))
{
byte[] bytes = key.getEncoded();
try
{
return new DESKeySpec(bytes);
}
catch (Exception e)
{
throw new InvalidKeySpecException(e.toString());
}
}
throw new InvalidKeySpecException("Invalid KeySpec");
}
protected SecretKey engineGenerateSecret(
KeySpec keySpec)
throws InvalidKeySpecException
{
if (keySpec instanceof DESKeySpec)
{
DESKeySpec desKeySpec = (DESKeySpec)keySpec;
return new SecretKeySpec(desKeySpec.getKey(), "DES");
}
return super.engineGenerateSecret(keySpec);
}
}
public static class Mappings
extends AlgorithmProvider
{
private static final String PREFIX = DES.class.getName();
private static final String PACKAGE = "org.spongycastle.jcajce.provider.symmetric"; // JDK 1.2
public Mappings()
{
}
public void configure(ConfigurableProvider provider)
{
provider.addAlgorithm("Cipher.DES", PREFIX + "$ECB");
provider.addAlgorithm("Cipher." + OIWObjectIdentifiers.desCBC, PREFIX + "$CBC");
addAlias(provider, OIWObjectIdentifiers.desCBC, "DES");
provider.addAlgorithm("Cipher.DESRFC3211WRAP", PREFIX + "$RFC3211");
provider.addAlgorithm("KeyGenerator.DES", PREFIX + "$KeyGenerator");
provider.addAlgorithm("SecretKeyFactory.DES", PREFIX + "$KeyFactory");
provider.addAlgorithm("Mac.DESCMAC", PREFIX + "$CMAC");
provider.addAlgorithm("Mac.DESMAC", PREFIX + "$CBCMAC");
provider.addAlgorithm("Alg.Alias.Mac.DES", "DESMAC");
provider.addAlgorithm("Mac.DESMAC/CFB8", PREFIX + "$DESCFB8");
provider.addAlgorithm("Alg.Alias.Mac.DES/CFB8", "DESMAC/CFB8");
provider.addAlgorithm("Mac.DESMAC64", PREFIX + "$DES64");
provider.addAlgorithm("Alg.Alias.Mac.DES64", "DESMAC64");
provider.addAlgorithm("Mac.DESMAC64WITHISO7816-4PADDING", PREFIX + "$DES64with7816d4");
provider.addAlgorithm("Alg.Alias.Mac.DES64WITHISO7816-4PADDING", "DESMAC64WITHISO7816-4PADDING");
provider.addAlgorithm("Alg.Alias.Mac.DESISO9797ALG1MACWITHISO7816-4PADDING", "DESMAC64WITHISO7816-4PADDING");
provider.addAlgorithm("Alg.Alias.Mac.DESISO9797ALG1WITHISO7816-4PADDING", "DESMAC64WITHISO7816-4PADDING");
provider.addAlgorithm("AlgorithmParameters.DES", PACKAGE + ".util.IvAlgorithmParameters");
provider.addAlgorithm("Alg.Alias.AlgorithmParameters." + OIWObjectIdentifiers.desCBC, "DES");
provider.addAlgorithm("AlgorithmParameterGenerator.DES", PREFIX + "$AlgParamGen");
provider.addAlgorithm("Alg.Alias.AlgorithmParameterGenerator." + OIWObjectIdentifiers.desCBC, "DES");
}
private void addAlias(ConfigurableProvider provider, ASN1ObjectIdentifier oid, String name)
{
provider.addAlgorithm("Alg.Alias.KeyGenerator." + oid.getId(), name);
provider.addAlgorithm("Alg.Alias.KeyFactory." + oid.getId(), name);
}
}
}